Method of making riders



Patented June 2, 1936 1iizirieiv'r vorrlei: v

2,042,541 l METHOD or MAKING amiens Davis Marinsky, Bronx, N. Y., assignor to Whitehall Patents Corporation, New York, N. Y., a corporation of New York Application October 4, 1934, Serial No. 746,770

16 Claims. y (Cl. .Z9- 148) This invention relates to the art of separable l fasteners, and particularly to the method -of manufacturing the riders employed on fasteners of this type for coupling and uncoupling the stringers; and the` object of the invention is to provide a method of making riders of the class described which consists in first automatically diecasting the body portion of the rider, vand then trimming and shaping the same by the use of suitable dies to form the ilnished rider; a further object being yto provide a method of the class described which by virtue 'of the manner of formlng the riders, the same may be produced rapidy ly, accurately and economically so as to materially reduceA the manufacturing cost thereof; and-with these and others objects in view, the invention consists in a rider of the class and for the purpose specified, made in accordance with the method more fully hereinafter described and claimed.

The invention is fully disclosed in the following specification, of which the accompanying drawing forms a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which:

Fig. 1 is a detail view of a part of a fastener l of the kind under consideration, indicating one of my improved riders thereon. Fig. 2 is a sectional view through a die and nozzle indicating the method of diecasting a rider.

Fig. 3 is a face view of the casting dies shown in Fig. 2 in closed position.

Fig. 4 is a view similar to Fig. 3 showing the dies in open position. Fig. 5 is a view similar to Figs. 3 and 4 show- 35 ing the dies in a partially closed position, indicating the step of removing the casting from the core.

Fig. 6 is a perspective view of the casing formedv from the dies shown in Figs. 2 to `5 inclusive. I

40 Fig. 7 shows views taken at right angles to each other of trimming dies which I employ.

. Fig. 8 shows sectional and elet-rational views of forming dies which I employ, showing the relative position of the workpiece with respect 45 thereto.

Fig. 9 shows views similar to Fig. 8, indicating the dies in closed position; and,

Fig. 10 is a perspective view of a rider made in accordance with the method. 50 For the purpose of illustrating one type of rider I made according to my invention and the use thereof, I have shown in Fig. 1 of the drawing a part of two stringers II-and I2 of a separable fastener, each stringer having at one edge thereof 55 coupling links or elements I 3, Il which .interlock in coupling the stringe II and I2 together. At I5, I have shown one of my improved riders which is movable longitudinally of the coupling elements I3, I4 of the stringers to couple and uncouple the same.

As will appear upon a consideration of Fig. 10 of the drawing, the rider I5 consists of an in. tegral or die cast body havinga'top plate portion I6, a bottom plate portion I'I joined by a substantiallywedge-shaped web, I8, note Figs. 8 and 10 9, which divides the Wide endl portion I9 of the rider into diverging channels( which intersect or join at the narrowV or contracted end 2l of the rider, the channels opening through the side edges of the rider in passages 22 formed between inl5 turned flanges 23 on the top and bottom walls I6 and l1. The top wall I6 alsoincludes anoutwardly projecting longitudinal bar 24 having recesses 25 in its opposed surfaces to receive a finger piece or pull 26, by means of whichthe 20 rider I5 is operated. vTheI pull 26 is movable longitudinally of the bar 24 in `the recesses 25 therein.

In carrying out my improved method of manufacturing riders of the kind set forth, unitary die cast blanks such as indicated at I5a in Fig. 6 '25 of the drawing are first produced by automatic die casting operations, and by the use of dies 21,

28 movable toward and from each other, each having impressions 21a, 28a, each forming one half of the resulting casting I5a. The adjacent 30 surfaces of the dies also include on their parting line a passage 29 forming the gate for admitting the casting material into the impressions of the dies as well as passages 30, 30a. receiving core pins or workpiece supports y3l, Sla. 35

Each of the diesv 21 and 28 includes water circulating passages 32 having an outlet 33 adjacent the impressions 21a and 28a to cool said dies to permit the formation or proper castings, and further to provide the rapid formation of castings in the casting machine. In this connection, attention is directed to the fact that the castings are formed' substantially by a machine such as is disclosed in aprior application filed by me, as coinventor, October 3, 1933, Serial Number 691,934. In Fig. 2 ofthe drawing, I have indicated' at 34 a part of apot or' container for the casting material 35 employed, the pot including a gooseneck discharge 36 having a plunger 31 at the inner end thereof, by means of which the material 35 may be forced under pressure outwardly through the discharge nozzle38 which is electrically or otherwise heated as indicated at 39, it

being understood that the pot. is also heated in any desired manner to maintain the material 55V 35 in. a fluid or substantially fluid state, facilitating the casting operations.

In forcing the material 35 into the impressions of the dies, it will be understood that the passage 5 38a of the nozzle 38 is in alinement with the gate or passage 29 as isclearly indicated in Fig. 2

of the drawing. After the material 35 has been forced into the impressions of the dies to form the casting |5a, the upward movement of the plunger 31 will draw the material 35 back into the gooseneck 36, thus preventing any clogging or congestion of the material within the nozzle.

After the casting has been formed, the dies 21 and 28 are separated as indicated in Fig. 4 of the drawing. The core pins 3|; 3|a serve as means for ejecting the casting from the impressions of the dies, whereas the pin 3| provides means for feeding the casting into the position shown in Fig. 5, it being understood that the casting is broken away from the core 3|a in this movement,

Vhe-core 3|a serving to-maintainalinement of the casting in the separation of the dies. When the core 3| is in the position shown in Fig. 5, the

dies are in a partially closed position with the casting |5a disposed immediately below the dies.

The casting is nowmemoved from the pin or core 3| by upward movement of the core, thus allowing the casting to drop into a suitable receptacle, the core returning to its normal position between the dies and the dies are again closed, permitting the formation of the next successive casting."

With the average size of rider cast in accordance with my improved method, a hundred or more castings per minute can be made with a single set of dies and the production thereof will va'ry depending upon the size of the casting and the particular type of casting material employed. In this connection, it will be understood that I 40 may employ different types of casting or molding material suitable for use in what is commonly known as pressure casting, for example, various kinds of metals or metal alloys which would be suitable for the p urpose herein intended and which would depend to some degree on the particular type or character of the mounting tape employed as well as the selling price of the complete fastener. .Thermoplastic materials capable of being molded or cast in accordance with the 5o method herein set forth can also be employed.

In the respectiveg oups of materials, I may use,v for example, in e metal group, such base metals as zinciand tin, or alloys containing such metals, whereas in the thermoplastic class, such materials as cellulose acetates may be employed.

'I'he next step in the method consists in trimming the castings Sato remove any fins or flares oi' 'metal that may revail thereon, such as indicated at |511, note g. 6, aswell as the'gate |5c. For this purpose, I use trimming dies 4|) and 4| such as are indicated in Fig. 7 of the drawing, the casting |5a being arranged on the die 40 in the manner shown in the two figures and the down- `ward 'movement of the die 4| will serve to force o5 j the casting through the opening 40a in the die 40,

which operation will trim oil' the flared metal |5b and thegate |5c.

In formingthe cast rider, up to this point, the

side edges oi' tlie walls I6 and I1 are straight. 'Ihe 70 next operation consists in turning these edges inwardly to form the flanges 23. This operation is performed by opposed curling or bending dies 42,

42a. seen in side elevation as well as in section vin Fig. 8. of the drawing. The opposedsurfaces 75 of said dies have curved and angularly disposed .to curl the same inwardly to form side flanges 0n the walls of the slider.

impressions 43, 43a for turning the edges of the walls inwardly as in the manner illustrated in the two views in Fig. 9 of the drawing.

In performing the bending operation, the casting |5a is first placed upon an anvil 44 having beveled side. walls 44a which form a backing against which the flanges are turned as may be clearly seen upon a consideration of Fig. 9 of the drawing. A plunger or mandrel 45 is also employed which seats in the anvil 44 and upon the triangular portion I8 of the casting by virtue of the V-shaped recess 45a at the lower end thereof, the sidewalls of the mandrel 45 beyond the anvil 44 supporting the upper portion of the flanges. After supporting the trimmed casting |5a upon the anvil 44 and mandrel 45, the dies 42, 42a are moved toward each other, turning the flanges inwardly after which said dies are separated and the mandrel 45 and anvil 44 removed from the finished rider, producing the results shown in Fig. l0 of the drawing.

At this time, it will also be apparent that the rider, when composed of metal or metal alloys, may be plated or coated to give any desired appearance thereto, consistent with that of the appearance-of the coupling links |3 and |4 or other links or elements forming part of the complete separable fastener, or the, said riders may be buffed, tumbled or polished to produce the desired finish thereon. The links I3 and |4 may 3 be made and applied to the tapes and |2 in any desired manner and may be die cast thereon.

With my improved method, the casting dies are intermittently moved toward and from each other in what mightl be termed a fixed horizontal plane 34 with a core upon'which the casting is formed movable transversely of the dies in a vertical `plane in feeding the casting out of the path of movement of the dies, and at the same tix'ne, providing a fixed core which is arranged horizontally 4( and from -which the casting is sheared or relmoved in the'descent of the first named core. The casting is supported on the horizontal core by a very thin wall or what might be termed a flare of metal or casting material which is read- 45 ily ruptured in the aforesaid operation.

It will be understood that the particular type' and contour of rider herein shown and described is merely illustrative of one type of device which may be employed, and in changing the size and 50 contour thereof, the several dies will be correspondingly changed to conform with the required design. f Having fully described my invention, what I claim as new and desire to secure by4 Letters Pat- 55 ent, is:

1. The herein described methodA of forming riders for separable fasteners of the class described which consists in providing relatively movable die casting dies with an impression 60 formed between adjacent surfaces thereof of a contour consistent with the rider blank to be produced, injecting casting material into the im pression of the dies along the parting rline thereof under pressure while securely supporting said dies against separation, removing the casting thus formed from the dies, then trimming the same by suitable dies to remove surplus cast material therefrom to produce a. cast rider blank, the side edges of the walls of which are straight, then arranging suitable backing tools within the rider inwardly of said side edges, and then moving curling dies toward thev side edges of the rider scribed which consists in providing relatively movable die casting dies with an impression formed between adjacent surfaces thereof of a contour consistent with the rider blank to be produced, injecting casting material. into the impression of the dies along the parting line thereof under pressure while securely supporting said dies against separation, removing the casting thus formed from the dies, then trimming the same by suitable dies to remove surplus cast may terial therefrom to produce a cast rider blank, the

side edges of the walls of which are straight, then arranging suitable backing tools within the rider inwardly of said side edges, then moving curling dies toward the side edges of the rider to curl the same inwardly to form side anges on the walls of the slider, and then coating or plating the rider thus formed.

3. The herein described method of making the riders of separable fasteners of the class de scribed, which consists in first forming die cast rider blanks by pressure casting in a suitable machine, then trimming the blanks to remove surplus cast material therefrom leaving a resulting blank consisting of spaced substantially parallel side walls having a channel between the walls diverging at one end of the blank, .then arranging relatively movable supporting tools within the channel of the rider inwardly of the side edges of said walls, and then moving forming tools in the direction of the side edges of said walls to turn the edges of opposed walls inwardly to form inturned flanges with a space therebetween.

4. The herein described method of making the riders of separable fasteners of the class described, which consists in rst forming die cast rider blanks by pressure casting in a suitable machine, then trimming the blanks to remove surplus cast material thereon leaving a resulting blank consisting of a spaced substantially parallel side walls having a channel between thewalls diverging at one end of the blank, then arranging relatively movable supporting tools within the channel of the rider inwardly of the side edges of said walls, then moving forming tools in the direction -of the side edges of said walls to turn the edges of opposed walls inwardly to form inturned flanges with'a space therebetween, then removing the tools from the resulting rider, and then treating the surface of the material'to produce the desired finish thereon.

5. The herein describedmeans of die casting channeled bodies of the class described which consists in providing relatively movable casting dies having an impression formed between adjacent and abutting surfaces of the dies, arranging a core between said surfaces of the dies and extending into the impression thereof, injecting casting material under pressure into the impression of the dies along the parting line thereof while maintaining the dies in firm engagement with each other, cooling the dies by the circulation of a cooling agent therethrough, utilizing the core as a means of ejecting the casting from the dies when separated, then stripping the casting from the core and then trimming and shaping the casting to form a channeled cast body of predetermined contour.

6. The herein described 1 f channeled bodies of the class described which consists in providing relatively movable casting dies having-an impression formed between adiacent and abutting-surfaces of the dies, arranging a core between said surfaces of the dies and extending into the impression thereof, injecting casting material under pressure into the impression of the dies along the parting line thereof while maintaining the dies in ilrm engagement with each other, cooling the dies by the circulation of a cooling agent therethrough, utilizing the core as a means of ejecting the casting from the dies when separated, then stripping the casting from the core, then trimming andshapingl the casting to form a channeled cast body of predetermined contour, and treating the surface of said body to produce a predetermined finish thereon.

7. The herein described means of die lcasting channeled bodies of the class Adescribed which consists in providing relatively movable casting dies having an impression formed between adjacent and abutting surfaces cf the dies, arranging a core between said surfaces of the dies and extending into the impression thereof, injecting casting maferial under pressure into the impression of the dies along the parting line thereof while maintaining the dies in i'lrm engagement with each other, cooling the dies by the circulation of a cooling agent therethrough, utilizing the core as a means of ejecting the casting from the dies when separated, then stripping the casting from the core, then trimmingl and shaping the casting to form a channeledcast body of pre- .each other in a plane parallel to the plane of the plates formed by the resulting casting and by injecting under pressure a suitable casting. material into said impression along the parting line of the die, removing the casting from the dies in the separation thereof, and then trimming and shaping the casting thus formed in a series of operations to produce on turned flanges at the side edges of said plates.

9. The herein described method of die vcasting a body consisting of spaced plates joined at one end by a connecting web with a channel formed between said plates opening through the side edges thereof, whichconsists in pressure casting said body by an impression formed between adjacent surfaces of dies vmovable relatively to each other in a planeparallel to the plane of the plates formed by the resulting casting and by injecting under pressure a suitable casting material into said impression along the parting line of the die, removing the casting from the dies in the separation thereof, then trimming and shaping the casting' thus formed in a series of operations "to produce on the finished body inturned flanges at the side edges of said plates, and then treating the surfaces of said body to provide a desired finish thereon.

10.". The herein described method of die casting a. body consisting of spaced plates joined at one end by a. connecting web with a channel formed between said plates opening through the side edges thereof, which consists in pressure casting said body by an impression formed between adjacent surfaces of dies movable relatively to each other in a plane parallel to the plane of the the finished body in.

a casting on bot-h of said cores, then separating the casting therefrom by saidA -the dies ejectlng turned flanges at the side edges of said plates, f

forming the casting on a core disposed between adjacent surfaces of the casting dies, and utilizing said core as a means for ejecting the casting from said dies. A

11. The herein described method of manufacturing die cast riders which consists in first forming a die cast blank consisting of spaced plates having contracted and ilared end portions joined centrally of the flared end portion by a connecting web, and then shaping the side edge 1 portions of the blank by suitable tools to form inturned flanges, adjacent edges of which are spaced apart longitudinally of the sides of saidv rider.

12. The herein described method of manufacturing die cast riders which consists in i'lrst forming a die cast blank consisting of spaced plates having contracted and flared end portions joined centrally of the flared end portion by a connecting web, then shaping the side edge portions of the blank by suitable tools to form inturned flanges, adjacent edges of which are spaced apart longitudinally of the sides of said rider, and then treating the product thus formed to provide a desired finish on the surface thereof.

13. In the. art of forming die castings, the method of forming a successive series of castings Which comprises intermittently moving cast,- ing dies toward and from each other in a horizontal plane, arranging a vertical core and a horizontal core between adjacent surfaces of the dies, the said cores extending into the impression formed between the dies, injecting casting material into the impression under pressure to form cores, then moving the vertical core transversely with respect to the path of movement of the dies to sever the casting from the horizontal core, and then removing the casting from the vertical core.

14. In the art of forming die castings, the

method of forming a successive series of castings which comprises intermittently moving casting dies toward and from each other in a horizontal plane, arranging a vertical core and a horizontal core lbetween adjacent surfaces ofthe dies, the said cores extending into the impression formed between the dies, injecting casting material into the impression under pressure to form a casting on both of said cores, then separating the dies ejecting the casting therefrom by said:

cores, then moving the vertical core transversely with respect tothe path of movement of the dies to sever the casting from the horizontal core, then removing the casting from the vertical core, and then trimming and shaping the casting thus formed to a predetermined contour.

15. In the art of forming die castings, the method of forming a successive series of castings which comprises intermittently moving casting dies toward and from each other in a horizontal plane, arranging a vertical core and a horizontal core between adjacent surfaces of the dies, the said cores extending into the impression formed between the dies, injecting casting material into the impression under pressure to form a castmg on both of said cores, then separating the dies ejecting the casting therefrom by said cores, then moving the vertical core transversely with respect to the path of movement of the dies to sever the casting from the horizontal core, then removing the casting from the vertical core, then trimming and shaping the casting thus formed to a predetermined contour, and then treating the same toprovide a desired finish thereon.

16. The herein described method of forming a successive series of die castings which consists in intermittently moving die parts toward and from each other, arranging a plurality of cores between adjacent surfaces of the dies when in closed position with said cores extending into a. single impression formed between the adjacent surfaces of the dies, forcing heated casting material into the impression along the parting line of the dies to form a casting arranged on said cores,V utilizing said cores as means for ejectingthe casting from the dies in the separation thereof, and utilizing one of the cores as a means for feeding and delivering thecasting.

DAVIS MARINSKY. 

